Tube holder



1950 J. G. KRONOUER ETAL $534,555

TUBE HOLDER Filed July 20, 1946 2| {7 I A FT v//////7? 8 2 I Hi r :1 p

INVENTORS JOHAN GEORGE 'KRONOUER BERNHARD LEONARD VAN KOUWEN Patented Dec. 19, 1950 -Johan George- Kronouer and Bern'ardLe'onard van Kouwen; Eindhovem' Netherlands, assignors to Hartford NationalBankand Trust Com- "pany, Hartford, Conn, as trustee 1 ApplioationJuly -20, 1946,Serial No.: 685,140 In the Netherlands June'28, 1945 ssume 1', Public Law,.690; August s; 1946 latenfiexp'ires June 28; 1965 .L'i-Claims; (013173-328) *Thi'sinvention"relates to tube holders provided U 3 iwith screening plates, 'and particularly to-holders *fontubeshaving agrooved centering pin.

Th'e arrangement of screenings in tube holders is -Ir-nown in manyforms of construction. Thus, "for example, it has been proposed to provide screenscooperating with the internaT-screening ota tube placed inthe'holderjthe tube holder being-generally constituted by an insulating body, \5 which-the contact springs are'housed in re- 'cesses; This insulating 'contact' carrier-- generally has a pair- 6f lugs provided with apertures for re'ceiving the fastening bolts-or'the like by means of which' the holder can-be secured to amounting "LE p1ate i Apart-from the comparatively 'complicated form of such insulating: 'contact' -carriers, owing to which the manufacture is costly and-stresses in "the material are frequently liable to'occur; so that the sturdiness is decreased,- an accumulation. of dust may be formed in the recesses and moisture may deposit, to which cracking contacts and in- 'sulation'difliculties are due.- In addition, it is not simple-to provide an effective screening, be-

- cause. this entails a still" more complicated form ot-the-insulating contact carrier. v

These difiiculties are-obviatedby the use ofa construction according to the invention, in which with a tube holderivfor a tube having-Ia grooved centering pin, the holder isconstituted by a pri- "marily annular insulating'b'ody which carries contact springs and 'has' a screen diametrically securedto it. This screen :serves for holding, mentoring and insuring the-correct insertion of the tube in the tube holder and in addition for.

fastening the holder to a mounting plate. 7 The scre'en'is preferably constituted by two small plates having their; end portions welded together, eachplate being provided with semi-cylindrical recesses se that-whenv welded .tOget-hera double.-

screen is formed" asymmetrically in sucli'manner that-a locationlug is formed on" one side thereof, said lug safeguarding the correct insertionof a tube in the holder. In'this case, the tube is prorvided with a: corresponding cut at the periphery 5-,of the tube-wall. "Inorderifurtheryto improve;

-Fig; l shows. a tubeholder -according to the -invention anddiagrammatically illustrates part thefscreenirig four projecting parts maybe bent over at right angles at the bottom of the -asymmetrical cut of the screen, with the result that auxiliary'screens are formed which are located in'the plane of the annular contact carrier.

The spring device which ensures that'the tube recesses of the insulating contact carrier and pass through slits of the sleeve into which thecentering: pin of the tube is. introduced. :On" insertion ".ofithe tube in theholder.thepieces'of steel wire being inserted in the holder.

arefc'aused' toenga'gea circular groove of the centhe :contact carrier andarefixed in these slots, for example by the-bending over of a pair of tags,

one of the tags also serving for the attachment by soldering of a lead-in wire. The springs may be so shaped as to cooperate with a tube provided with lateral contacts, but as'an alternative:these springs may be bent so as to permit 015a tube having-straight contact pins sealed in its-bottom The contact-carrying body may be made of mostof the well-known insulating substances,

i such as-synthetic resin, ceramic material-or the pins.

z-of I moulded glassor glassimade-of glass powder in such manner as to comprise fine cavities to -the extent .of' at. least 5%..

like.v It is even possible to :make the contactcarrying body ofglass and in this case the-contact pins may, for example, be fastened to-sealed-in For this. purpose use is preferably --made In "order that the invention may be clearly understood and readily carried intoefi'ect,it will now beidescribed more fully with reference to the accompanying d'rawing,' in*which of'ra tube in: positionybefore: attachment :to the holder; and

; .Referring to'iFig.v1,' ladesignates the insulating :annulz'au "body to "which contacts 3: are fastened.

Fig.'.-2jis a plan view of the tube-holden The ringscontains a diametrically-arranged screen -2" acc0rding.to the invention, constituted. by two -.metal plates 2', 2'. which arewelded so as to lie Fin-contact and each. of which comprisesthree 3.;Semi-bylindrical portions which. jointlyform Fidoublej flanged bushes-5 and-a central sleeve 9. i. Thebottom's 6. ofthe. flanged bushes 5 are introduced: into; the vapertureseof the lugsof the inthe holder the centering pin of the tube slides into the sleeve 9, the springs 4, i being pressed apart until they are caused to engage the groove H of this central pin and thus fix the tube in the holder.

lug 8 of the screen 2 which engages a c' orresponding out [5 in the sidewall and the bottom of the tube. Parts Hi of screen 2 are bent over at right angles at the bottom of the-cut, so that they are caused to be located in the'plane of the insulating contact carrier i and this provides an additional Zximprovement in the screening. It is obvious that this construction avoids formation of dust ooliect- 'ing' chambers. The springs 3 are secured to. the insulating body by bent-over tags I l and the tags 112; serve for the attachment of the lead-in Wires by soldering. What we, claim is: p .1 1. A ,holder foran electronic; tube having a xlongitudinally extending locating pin, said holder beingadapted: to be secured to a base having r'ecesses :and comprising a substantially annular insulating body having diametrically opposed radially extending slots in the inner wall thereof and having diametrically opposed longitudinal recesses, and a metallic member comprising .-two metallic plates each having three semil cylindrical recesses and joined together with said recesses of each plate in opposition to form three tubular portions, each of the outer two of said tubular I portions having side walls extending longitudinally and being provided with flanges on each end, one flange of each of which engages one of said recesses in said annular member and the other said flange of each being adapted to engage a recess in said base, two spring members engaged diametrically in said slots, the third said tubular portion having side walls extendin longitudinally,- said third tubular portion side walls having two diametrically opposed transverse slots. through each of twhich passes one said spring member, said third mtubular portion'being adapted to receive said locating pin and said spring 'members being adapted to engage said locating pinwithin said third tubular portion.

2. A holder for an electronic tube havinga portion with a longitudinal'indenta'tion and having a longitudinally extending locating pin, said holder being adapted to be secured to a base having" recesses and comprisin a substantially annular insulating body having diametrically opposed radially extending slots in the inner wall thereof and having diametrically Opposed. lonigitudinal recesses; and a metallic memberz'comprising, two-g metallic plates each havingthree -i.Semi'-c'ylindrical' recesses and joined together with. said recesses of each plate in opposition to form' three tubular portions; each of :the :outer ---two of said tubular portions having sidewalls extending longitudinally and being provided with flanges on each end, one flange of each of i which engages one said recess in. said annular The ends of these springs" The correct insertion of .the. tube. in the holder is effected by means of a location;

4 member and the other said flange of each bein adapted to engage one of said recesses in said base, two spring member engaged diametrically in said slots, the third said tubular portion having side walls extending longitudinally, said third tubular portion Walls having two diametrically opposed transverse slots through each of which passes one said spring member, said third tubular portion being adapted to receive' said locating '--pin and said spring members being adapted to engage said locating pin within said third tubular portion, one said metallic plate'having a portion extending substantially Tin a longitudinal plane and adapted to engage said indentation in said electronic tube portion.

3. A holderfor an electronic tube having a portion witha longitudinal indentation and having a longitudinally extending locating pin, said holder being adapted to be secured to a base having recesses and comprising a substantially annular insulating body having diametrically opposed radially extending slots in the innerwall thereof and having diametrically opposed lon itudinal recesses, and a metallic member comprising two metallic plates each having shielding tags extendin substantially in a transverse plane and each having three semi-cylindrical rrecesses and joined together with said recesses of each plate in opposition to form three tubular portions, each of the outer two of said tubular, portions having side walls extending longitudinally and being provided with flanges on each end, one flange of each of which engages one said recess in said annular member and the other said flange of each being adapted-to engage a recess in saidbase, two spring members engaged diametrically in said slots, the third said tubular portion havin side walls extending longitudinally, said third tubular portion side walls having two diametrically opposed transverse slots through each of which passes one said spring member, said third tubular portion being adapted to receive said locating pin and said spring members being adapted to engage said locating pin within said third tubular portion, one said metallic plate having a por- "tion extending substantially in a longitudinal plane and adapted to engage said indentation in said electronic tube portion.

. 4. A holder for an electronic tube havinga centering pin and contact members, said holder .being adapted to be secured to a base and hav- "ing a substantially ring-shaped insulating body with c'ontaotreceivin'g portions adapted to receive the contact members of said tube, said holder comprising an integral member for screen- 'ing the lead-in connections of said tube from each other, for attaching the holder to said base, and for holding the electronic tube, said screening member being arranged diametrically across "the insulating body andcomprising two'metallic plates-each having three semi-cylindricalrecesses which joined together with said recesses of each plate in opposition form two outer and one intermediate tubular portions,'the intermediate tubular portion bein adapted to hold the central pin of said electronic tube and the'two g. outer. tubular portions being each providedfwith a flange at their top'and bottom ends, one :of

,said-rflanges of each-tubular portion. being .':adapted to engage a recessin-said base, and the other said flange being adapted a e 'a recess in said insulating body.

-' .5. 'A holder for an electronic tube having'a centering pinwith a retaining groove therein and contact members, said holder being adapted to be secured to a base and having a substantially ring-shaped insulating body with contact receiving portions adapted to receive the contact members of said tube, said holder comprising an integral member for screening the lead-in connections of said tube from each other, for attaching the holder to said base, and for holding the electronic tube after insertion into the holder, said screening member being arranged diametrically across the insulating body and comprising two metallic plates each havin three semi-cylindrical recesses which joined together with said recesses of each plate in opposition form two outer and one intermediate tubular portions, the intermediate tubular portion having transverse slots in its Wall, spring means arranged on said insulating body and extending diametrically across the same for engagement with said slots and adapted to be received in the groove of the centering pin of the electronic tube for holdin the latter, the two outer tubular portions of the screening member being each provided with a flange at their top and bottom ends, one of said flanges of each tubular portion being adapted to engage a recess in said base, and the other said flange being adapted to engage a recess in said insulating body.

6. A holder for an electronic tube having a centering pin with a retaining groove therein and contact members, said holder being adapted to be secured to a base and having a substantially ring-shaped insulating body with contact receiving portions adapted to receive the contact members of said tube, said holder comprising an integral member for screening the lead-in connections of said tube from each other, for attaching the holder to said base, and for holding the electronic tube after insertion into the holder, said screening member being arranged diametrically across the insulatin body and comprising two metallic plates each having three semicylindrical recesses which joined together with said' recesses of each plate in opposition form two outer and one intermediate tubular portions, the intermediate tubular portion having transverse slots in its wall, spring means arranged on said insulatin body and extending diametrically across the same for engagement with said slots and adapted to be received in the groove of the centering pin of the electronic tube for holding the latter, the two outer tubular portions of the screening member being each provided with a flange at their top and bottom ends, one of said flanges of each tubular portion being adapted to engage a recess in said base, and the other said flange being adapted to engage a recess in said insulating body, said screening member having a part of each metal plate bent over at right angles so as to lie in the plane of the insulating body, whereby additional screening is provided.

7. A holder for an electronic tube having a centering pin-with a retaining groove therein and contact members, said holder being adapted to be secured to a base and having a substantially ring-shaped insulating body with contact receiving portions adapted to receive the contact members of said tube, said holder comprising an integral member for screening the lead-in connections of said tube from each other, for attaching the holder to said base, for correct insertion of the tube in the holder and for holding the tube after insertion, said screening member being arranged diametrically across the insulating body and comprising two metallic plates each having three semi-cylindrical recesses which joined together with said recesses of each plate in opposition form two outer and one intermediate tubular portions, the intermediate tubular portion having transverse slots in its wall, sprin means arranged on said insulating body and extending diametrically across the same for engagement with said slots and adapted to be received in the groove of th centering pin of the electronic tube for holding the latter, the two outer tubular portions of the screening member bein each provided with a flange at their top and bottom ends, one of said flanges of each tubular portion being adapted to engage a recess in said base, and the other said flange being adapted to engage a-recess in said insulating body, said screening member having formed thereon a locating lug and said electronic tube having a out near the bottom thereof corresponding to said lug for engagement therewith and for correct insertion of the tube into the holder.

JOI-IAN GEORGE KRONOUER. BERNARD LEONARD VAN KOUWEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,792,866 Rabezzana Feb. 17, 1931 2,187,527 Wells Jan. 16, 1940 2,259,738 Del Camp Oct. 21, 1941 2,259,739 Del Camp Oct. 21, 1941 FOREIGN PATENTS Number Country Date 44,663 France Dec. 26, 1934 (3rd addition to No. 766,524)

44,226 France Sept. 10, 1934 (1st addition to No. 766,524)

334,310 England Sept. 4, 1930 744,842 France Jan. 31, 1933 213,132 Switzerland May 1, 1941 

